You will find R.O.X. from a quest given in the Temple of the Ages. After speaking to Salma, you enter into a mini-mission to defend the Temple of the Ages. Before the mini-mission starts you are given the opportunity to have the acolytes of the temple pray for your team: depending on which god(s) you tell them to pray to, they will provide you with one or more of the following blessings: The time counts down to zero, and waves of level 20 Golems come crashing down, until R.O.X shows up in the last wave. R.O.X. must be defeated to complete the mini-mission.